CONVECTION IN COLLOIDAL SUSPENSIONS BY NEUTRON TOMOGRAPHY
We proposed here to: (i) - study the processus of skin formation on the drying surface of colloidal suspensions in presence of convection (ii) - characterize the intertwinned actions of convection on skin formation and structure, and of fluid structure on convection, by Neutron tomography and SANS. The samples are silica nanoparticules (D=14nm and 8nm) in water as solvent; the water evaporation at the top surface will be controlled by closing the cell temporary or imposing a flux of dry N2; the bottom of the cell could also be kept at a hot temperature T=40-50°C with a circulating bath in order to enhance convection by the generation of active hot upwellings. The initial colloidal particle concentration, as well as the particle diameter will be varied. We ask for 6 days at the test tomography station of the ILL and for 3 days on D33 to analyze the aggregation process of the nanoparticles that takes place in the convection cell.
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Davaille; alba-simionesco; CUBITT Robert; HELFEN Lukas; LETICHE Manon; MATSARSKAIA Olga; Frédéric OTT and REMISE-CHARLOT Hugo. (2021). CONVECTION IN COLLOIDAL SUSPENSIONS BY NEUTRON TOMOGRAPHY. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1659
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